/*
** $Id: ltable.h $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/

#ifndef ltable_h
#define ltable_h

#include "lobject.h"

#define gnode(t, i) (&(t)->node[i])
#define gval(n)     (&(n)->i_val)
#define gnext(n)    ((n)->u.next)

/*
** Clear all bits of fast-access metamethods, which means that the table
** may have any of these metamethods. (First access that fails after the
** clearing will set the bit again.)
*/
#define invalidateTMcache(t) ((t)->flags &= ~maskflags)

/* true when 't' is using 'dummynode' as its hash part */
#define isdummy(t) ((t)->lastfree == NULL)

/* allocated size for hash nodes */
#define allocsizenode(t) (isdummy(t) ? 0 : sizenode(t))

/* returns the Node, given the value of a table entry */
#define nodefromval(v) cast(Node *, (v))

LUAI_FUNC const TValue *luaH_getint(Table *t, lua_Integer key);
LUAI_FUNC void luaH_setint(lua_State *L, Table *t, lua_Integer key,
                           TValue *value);
LUAI_FUNC const TValue *luaH_getshortstr(Table *t, TString *key);
LUAI_FUNC const TValue *luaH_getstr(Table *t, TString *key);
LUAI_FUNC const TValue *luaH_get(Table *t, const TValue *key);
LUAI_FUNC void luaH_newkey(lua_State *L, Table *t, const TValue *key,
                           TValue *value);
LUAI_FUNC void luaH_set(lua_State *L, Table *t, const TValue *key,
                        TValue *value);
LUAI_FUNC void luaH_finishset(lua_State *L, Table *t, const TValue *key,
                              const TValue *slot, TValue *value);
LUAI_FUNC Table *luaH_new(lua_State *L);
LUAI_FUNC void luaH_resize(lua_State *L, Table *t, unsigned int nasize,
                           unsigned int nhsize);
LUAI_FUNC void luaH_resizearray(lua_State *L, Table *t, unsigned int nasize);
LUAI_FUNC void luaH_free(lua_State *L, Table *t);
LUAI_FUNC int luaH_next(lua_State *L, Table *t, StkId key);
LUAI_FUNC lua_Unsigned luaH_getn(Table *t);
LUAI_FUNC unsigned int luaH_realasize(const Table *t);

#if defined(LUA_DEBUG)
LUAI_FUNC Node *luaH_mainposition(const Table *t, const TValue *key);
LUAI_FUNC int luaH_isdummy(const Table *t);
#endif

#endif
